GENERAL DESCRIPTION

The PCD3360 is a CMOS integrated circuit, designed to replace the electro-mechanical bell in telephone sets. It meets most postal requirements, with selectivity of output tone sequences and input ringer frequencies. Output signals for a loudspeaker or for a piezo-electric (PXE) transducer are provided. No audio transformer is required since the loudspeaker is driven in class D.

FEATURES

• Output signals for electro-dynamic transducer (loudspeaker) or for piezo-electric transducer (PXE)

• 7 basic output frequencies (tones) and a pause

• 4 selectable tone sequences

• 4 selectable repetition rates

• 3 selectable impedance settings

• 3-step automatic swell

• Delta-modulated output signal that approximates a sinewave

• Input ringing frequency discriminator with selectable upper and lower frequency limits

• Output for optical signal

• Customized tone sequences, impedance settings and automatic swell levels are mask programmable.